docs: def cli(env, identifier):
      """Get details about a security group."""
  
      mgr = SoftLayer.NetworkManager(env.client)
  
      secgroup = mgr.get_securitygroup(identifier)
  
      table = formatting.KeyValueTable(['name', 'value'])
      table.align['name'] = 'r'
      table.align['value'] = 'l'
  
      table.add_row(['id', secgroup['id']])
      table.add_row(['name', secgroup.get('name') or formatting.blank()])
      table.add_row(['description',
                     secgroup.get('description') or formatting.blank()])
  
      rule_table = formatting.Table(['id', 'remoteIp', 'remoteGroupId',
                                     'direction', 'ethertype', 'portRangeMin',
                                     'portRangeMax', 'protocol'])
      for rule in secgroup.get('rules', []):
          rg_id = rule.get('remoteGroup', {}).get('id') or formatting.blank()
          port_min = rule.get('portRangeMin')
          port_max = rule.get('portRangeMax')
          if port_min is None:
              port_min = formatting.blank()
          if port_max is None:
              port_max = formatting.blank()
          rule_table.add_row([rule['id'],
                              rule.get('remoteIp') or formatting.blank(),
                              rule.get('remoteGroupId', rg_id),
                              rule['direction'],
                              rule.get('ethertype') or formatting.blank(),
                              port_min,
                              port_max,
                              rule.get('protocol') or formatting.blank()])
  
      table.add_row(['rules', rule_table])
  
      vsi_table = formatting.Table(['id', 'hostname', 'interface', 'ipAddress'])
  
      for binding in secgroup.get('networkComponentBindings', []):
          try:
              vsi = binding['networkComponent']['guest']
              vsi_id = vsi['id']
              hostname = vsi['hostname']
              interface = ('PRIVATE' if binding['networkComponent']['port'] == 0
                           else 'PUBLIC')
              ip_address = (vsi['primaryBackendIpAddress']
                            if binding['networkComponent']['port'] == 0
                            else vsi['primaryIpAddress'])
          except KeyError:
              vsi_id = "N/A"
              hostname = "Not enough permission to view"
              interface = "N/A"
              ip_address = "N/A"
          vsi_table.add_row([vsi_id, hostname, interface, ip_address])
  
      table.add_row(['servers', vsi_table])
  
      env.fout(table)